第二课

two2

Sun and shadow太阳和影子

1. In the morning, the shadow of the flagpole is in the west;

早晨，旗杆的影子在西边;

2. In the evening, the shadow of the flagpole was in the east.

傍晚，旗杆的影子在东边。

3. Why?为什么呢?

Material package材料包

4. Watch, long tape tape, flashlight, etc手表、长卷尺、手电筒等

Activity process活动过程

5. What is the direction and length of the shadow in the sun during the day?

一天中，阳光下物体影子的方向与长度有什么变化?

6. Half an hour, we'll watch it again.过半个小时，我们再观察一次。

7. Find a fixed object to study.找一个固定物体来研究。

8. The direction of the pencil shadow is more than half an hour ago...

铅笔影子的方向比半小时前......

9. At noon, the shadow of the pencil is short.

中午，铅笔的的影子短。

10. Observe a few more days, every day the shadow of the object is short at noon?

多观察几天，每天物体的影子都是中午短吗?

Inquiry skills探究技能

11. By observing the shadows of objects in the sun,通过观察阳光下物体的影子，

12. Say "what is the relationship between the direction of the shadow and the position of the sun" and so on,

说出“影子方向与太阳位置有什么关系”等问题，

13. Is asking questions.就是在提出问题。

14. What is the law of the change of the shadow of the object in the sun?

一天中，阳光下物体影子的变化规律是怎样的?

15. Let's do a simulation.我们做个模拟实验吧。

16. 西West

17. 南South

18. 北North

19. 东East

20. During the day, the direction of the sun changes as the position of the sun changes.

一天中，阳光下物体影子的方向随着太阳位置的改变而改变。

21. Morning and evening shadow is longer, noon shadow is shorter.

早晨和傍晚影子比较长，中午影子比较短。

Outreach activities拓展活动

22. During a month, every few days, observe the direction and length of the shadow of the same fixed object at the same time.

一个月中，每隔几天，在同一时刻观察同一固定物体的影子的方向和长度有什么变化。